Abrasive waterjet cutting monitoring of materials in recent years has become an important area of research. The article deals with potential applications vibration analysis at technological process of cutting of material. In order to provide the vibration analysis at abrasive waterjet cutting, have been carried out experiments to measure vibration and ultrasonic emissions in order to ascertain the context of the parameters measured vibrations with the technology division of aluminium. The main challenge is finding the existence of the link between the focusing tube wear and vibration. and Monitorovanie hydroabrazívneho delenia materiálov hydroabrazívnym prúdom sa v posledných rokoch stalo dôležitou oblasťou výskumu. Článok sa zaoberá možnosťou aplikácie vibrodiagnostiky technologického procesu delenia materiálu. Za účelom zistenia vibrácií pri hydroabrazívnom delení, boli vykonané experimenty zamerané na meranie vibrácií a ultrazvukovej emisie s cieľom zistenia súvislosti meraných parametrov vibrácií s technologickými podmienkami delenia hliníka. Hlavnou úlohou je zistenie existencie súvislosti medzi opotrebovaním fokusačnej trubice a vibráciami.
In this paper, we introduce related comparability for exchange ideals. Let $I$ be an exchange ideal of a ring $R$. If $I$ satisfies related comparability, then for any regular matrix $A\in M_n(I)$, there exist left invertible $U_1,U_2\in M_n(R)$ and right invertible $V_1,V_2\in M_n(R)$ such that $U_1V_1AU_2V_2= \operatorname{diag}(e_1,\cdots ,e_n)$ for idempotents $e_1,\cdots ,e_n\in I$.
Pierre-Joseph Proudhon is generally regarded to be one of the founders of anarchism. Anarchism as a political current is most often characterized by its values and attitudes, but the research into it seldom considers how these values and attitudes are connected to the modes of thinking and argumentation of its most prominent representatives. Proudhon is a good example of this. His extensive and varied body of work illustrates the connection between the emancipatory ideals of anarchism and the complexity and polysemy of the non-authoritarian way of thinking. The article attempts to demonstrate his methods of thinking with several examples that treat such basic themes of his work as the question of justice, the problem of property, mutual support (i.e. mutualism) and the political organization of society along federated lines. The article also points to the ambiguous acceptance of Proudhon’s work by individual anarchist currents and also to certain limits to his way of thinking that result from his acceptance of certain problematic starting points. and Pierre-Joseph Proudhon bývá pokládán za jednoho ze zakladatelů anarchismu. Anarchismus jako politický proud je zpravidla charakterizován svými hodnotami a postoji, ovšem málokdy se při jeho zkoumání uvažuje o tom, jak tyto hodnoty a postoje souvisejí se způsoby myšlení a argumentace jeho výrazných představitelů. Proudhon je však právě v tomto ohledu dobrým příkladem. Jeho rozsáhlé a rozmanité dílo ilustruje spojitost mezi emancipačními ideály anarchismu a komplexností a mnohovýznamovostí neautoritativního způsobu myšlení. Stať se pokouší demonstrovat Proudhonovy způsoby myšlení na několika příkladech zpracování takových základních témat jeho díla, jako je otázka spravedlnosti, problém vlastnictví, vzájemné podpory čili mutualismu, či federativního politického uspořádání společnosti. Poukazuje též na nejednoznačné přijetí Proudhonova díla jednotlivými anarchistickými proudy a také na jisté meze jeho způsobu uvažování, vyplývající z přijetí určitých problematických východisek.
The majority of matter in our universe exists at high pressures and high temperature, such as found in the deep interior of planets and stars, beyond those experienced the surface of the Earth. Recent development in high pressure techniques enabled simulation of these conditions in laboratoire and thus investigaton of matter at extreme (high pressures and temperatures) conditions. A static compression technique utilizing a diamond anvil-cell (DAC) is today a well-established technique yielding a wealth of information on the behaviour of highle-compressed materials. It soon became clear that matter can adopt complex structures and can exhibit exotic physical properties under pressure. The DAC is a powerful tool, spread across multiple research disciplines from material science searching for novel materials to planetary sciences shedding light on the most remote parts of our planet., Zuzana Konôpková., and Obsahuje seznam literatury
The diameter of a graph G is the maximal distance between two vertices of G. A graph G is said to be diameter-edge-invariant, if d(G−e) = d(G) for all its edges, diametervertex-invariant, if d(G − v) = d(G) for all its vertices and diameter-adding-invariant if d(G + e) = d(e) for all edges of the complement of the edge set of G. This paper describes some properties of such graphs and gives several existence results and bounds for parameters of diameter-invariant graphs.
This article presents the little known diary entries of the priest P. Václav Vojtěch Berenklau († 1699) primarily from the Kladruby period of his activities (1675-1677). An attempt is also made to compare his diary with a fragment from 1662-1663 of a priest's diary belonging to P. Jan Manner in Prague and the as yet largely unexamined diary specimens from the famous P. Bartoloměj Michal Zelenka from the time he was active in Brandýs nad Labem. In addition to these diaries, the diary is also compared with notes made by the distinguished Baroque preacher and writer O. F. De Waldt.